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Patent US4872307A successfully refreshed from Google Patents.
US4872307A
Expired / Lapsed
US
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Retrofit of simple cycle gas turbines for compressed air energy storage application
Assignee: UE&C URBAN SERVICES Corp
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Filing: 1987-05-13
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Granted: 1989-10-10
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Expires: 2007-05-13
Abstract
Abstract A system is disclosed for retrofitting a plurality of gas turbines for use in compression and expansion stages of a power plant. A first gas turbine is modified to perform as a motor driven air compressor compressing air and storing such compressed air in an air storage device. A second gas turbine is modified to perform as a generator driving expander in which air previously compressed is expanded in a turbine thus generating power.
Inventors
- 👤 Michael Nakhamkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:46
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/14; F02C6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/16
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
153 words
In a gas turbine power plant of the type in which first and second gas turbine engines are each used to produce power, each of said engines comprising an air compressor, a turbine element and a combustor, the improvement comprising the steps of: deblading said turbine element of said first gas turbine engine; coupling an additional compressor to said first gas turbine engine, said additional compressor having a compressed air input connected to a compressed air output of said compressor of said first gas turbine engine and a compressed air output connected to an air storage device; coupling to said additional compressor and said compressor of said first gas turbine engine means for driving them; deblading said compressor of said second gas turbine engine; and providing compressed air from said air storage device to said turbine element of said second gas turbine engine instead of said compressor of said second gas turbine engine.
Claim 2
Dependent Claim
153 words
In a gas turbine power plant of the type in which first and second gas turbine engines are each used to produce power, each of said engines comprising an air compressor, a turbine element and a combustor, the improvement comprising the steps of: deblading said turbine element of said first gas turbine engine; coupling an additional compressor to said first gas turbine engine, said additional compressor having a compressed air input connected to a compressed air output of said compressor of said first gas turbine engine and a compressed air output connected to an air storage device; coupling to said additional compressor and said compressor of said first gas turbine engine means for driving them; deblading said compressor of said second gas turbine engine; and providing compressed air from said air storage device to said turbine element of said second gas turbine engine instead of said compressor of said second gas turbine engine.
Claim 3
Dependent Claim
60 words
The method of claim 1 wherein said step of coupling comprises the steps of: coupling a first electrical driving machine to a shaft of said first gas turbine engine, to which said turbine element and said compressor of said first gas turbine engine may be coupled; and coupling a second electrical driving machine to a shaft of said additional compressor.
Claim 4
Dependent Claim
68 words
The method of claim 1 further comprising the steps of: coupling a first thrust bearing to said shaft of said first gas turbine engine to compensate for said deblading of said turbine element of said first gas turbine engine; and coupling a second thrust bearing to said shaft of said second gas turbine engine to compensate for said deblading of said compressor of said second gas turbine engine.
Claim 5
Dependent Claim
54 words
The method of claim 1 further comprising the steps of: inserting an intercooler between said compressed air output of said compressor of said first gas turbine engine and said compressed air input of said additional compressor; and inserting an aftercooler between a compressed air output of said additional compressor and an air storage device.
Claim 6
Dependent Claim
41 words
The method of claim 2 further comprising the step of coupling an electrical generating machine to a shaft of said second gas turbine engine, to which said turbine element and said compressor of said second gas turbine engine may be coupled.
Claim 7
Dependent Claim
42 words
The method of claim 1 further comprising the step of: coupling an electrical generating machine to a shaft of said second gas turbine engine, to which shaft said turbine element and said compressor of said second gas turbine engine may be coupled.
Claim 8
Dependent Claim
50 words
The method of claim 1 wherein the step of coupling said driving means comprises coupling an electrical driving machine to a shaft of said first gas turbine engine, to which shaft said turbine element, said compressor of said first gas turbine engine and said additional compressor may all be coupled.
Claim 9
Independent Claim
118 words
A method for modifying a plurality of gas turbine engines for use in a Compressed Air Energy Storage (CAES) system comprising the steps of: deblading a turbine element of a first gas turbine engine; providing compressed air from a compressed air output of a compressor of said first gas turbine engine to an air storage device instead of to said turbine element of said first gas turbine engine; deblading a compressor of a second gas turbine engine; providing compressed air from said air storage device to a turbine element of said second gas turbine engine in place of air from said compressor of said second gas turbine engine; and coupling driving means to said first gas turbine engine.
Claim 10
Independent Claim
118 words
A method for modifying a plurality of gas turbine engines for use in a Compressed Air Energy Storage (CAES) system comprising the steps of: deblading a turbine element of a first gas turbine engine; providing compressed air from a compressed air output of a compressor of said first gas turbine engine to an air storage device instead of to said turbine element of said first gas turbine engine; deblading a compressor of a second gas turbine engine; providing compressed air from said air storage device to a turbine element of said second gas turbine engine in place of air from said compressor of said second gas turbine engine; and coupling driving means to said first gas turbine engine.
Claim 11
Dependent Claim
84 words
The method of claim 8 wherein said step of coupling comprises the step of: coupling an electrical driving machine to a shaft of said first gas turbine engine, to which said turbine element and said compressor of said first gas turbine engine may be coupled; and said method further comprises the step of: coupling an electrical generating machine to a shaft of said second gas turbine engine, to which said turbine element and said compressor of said second gas turbine engine may be coupled.
Claim 12
Dependent Claim
58 words
The method of claim 9 further comprising the steps of: coupling a first thrust bearing to said shaft of said first gas turbine engine to compensate for said deblading of said first turbine element; and coupling a second thrust bearing to said shaft of said second gas turbine engine to compensate for said deblading of said second compressor.
Claim 13
Dependent Claim
32 words
The method of claim 8 further comprising the step of: inserting an aftercooler between said compressed air output of said compressor of said first gas turbine engine and said air storage device.
Claim 14
Dependent Claim
65 words
The method of claim 8 further comprising the steps of: coupling an additional compressor to said compressed air output of said compressor of said first gas turbine engine to further compress air compressed by said compressor of said first gas turbine engine, said additional compressor having a compressed air output coupled to said air storage device; and providing driving means for driving said additional compressor.
Claim 15
Dependent Claim
89 words
A Compressed Air Energy Storage (CAES) system comprising: a first gas turbine engine having a shaft coupled to electrical driving means, a compressor and a debladed turbine element; a second gas turbine engine having a shaft coupled to electrical generating means, a turbine element and a debladed compressor; a first interconnection from a compressed air output of said compressor of said first gas turbine engine to an air storage device; and a second interconnection from said air storage device to said turbine element of said second gas turbine engine.
Claim 16
Dependent Claim
89 words
A Compressed Air Energy Storage (CAES) system comprising: a first gas turbine engine having a shaft coupled to electrical driving means, a compressor and a debladed turbine element; a second gas turbine engine having a shaft coupled to electrical generating means, a turbine element and a debladed compressor; a first interconnection from a compressed air output of said compressor of said first gas turbine engine to an air storage device; and a second interconnection from said air storage device to said turbine element of said second gas turbine engine.
Claim 17
Dependent Claim
46 words
The CAES system of claim 13 further comprising a combustor connected to said second interconnection between said air storage device and said turbine element of said second gas turbine engine, said combustor being used for the combustion of a mixture of a fuel and compressed air.
Claim 18
Dependent Claim
30 words
The CAES system of claim 13 further comprising an additional compressor connected to said first interconnection between said compressor of said first gas turbine engine and said air storage device.
Claim 19
Dependent Claim
28 words
The CAES system of claim 15 further comprising an intercooler connected to said first interconnection between said compressor of said first gas turbine engine and said additional compressor.
Claim 20
Dependent Claim
24 words
The CAES system of claim 15 further comprising an aftercooler connected to said first interconnection between said additional compressor and said air storage device.
Claim 21
Dependent Claim
56 words
The CAES system of claim 13 further comprising: a first thrust bearing coupled to said shaft of said first gas turbine engine to compensate for thrust associated with said debladed turbine element; and a second thrust bearing coupled to said shaft of said second gas turbine engine to compensate for thrust associated with said debladed compressor.
Claim 22
Dependent Claim
14 words
The CAES system of claim 13 wherein said electrical driving means is a motor.
Claim 23
Dependent Claim
14 words
The CAES system of claim 13 wherein said electrical generating means is a generator.
Claim 24
Dependent Claim
17 words
The CAES system of claim 15 wherein said additional compressor is driven by said electrical driving means.
Claim 25
Dependent Claim
18 words
The CAES system of claim 15 wherein said additional compressor is driven by a further electrical driving machine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |